Step-by-step explanation:
1. draw the parallelogram with side 20cm and 25cm respectively and also the diagonal as well.
2.Clearly it forms a triangle in the parallelogram with three known lengths of side.
3.Using the cosine rule : c^2=b^2+c^2 -2bc cos c to find the obtuse angle.
Answer: V= -282
Explanation: if you subtract 21 from 303 you end up with -282 and to recheck you can add -282 with 303 and the total would be 21.
I am gonna go C I am not completely sure but it is most likely to be the right one
Answer:
1,645.92 centimeters
Step-by-step explanation: